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Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
The de Broglie Wavelength02:32

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

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Related Experiment Video

Updated: May 24, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Spin wave diffraction and perfect imaging of a grating.

S Mansfeld1, J Topp, K Martens

  • 1Institut für Angewandte Physik und Mikrostrukturforschungszentrum, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.

Physical Review Letters
|March 10, 2012
PubMed
Summary

Researchers observed unique spin wave diffraction patterns using microslits in a Permalloy film. These patterns reveal spin wave field replications finer than the incident wavelength, due to anisotropic spin wave dispersion.

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Related Experiment Videos

Last Updated: May 24, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Area of Science:

  • Condensed Matter Physics
  • Magnonics
  • Spintronics

Background:

  • Spin waves, collective excitations in magnetic materials, are crucial for next-generation data processing.
  • Controlling spin wave propagation is essential for developing magnonic devices.
  • Damon-Eshbach spin waves are a fundamental type of spin wave studied in thin magnetic films.

Purpose of the Study:

  • To investigate the diffraction of Damon-Eshbach spin waves by a one-dimensional grating.
  • To analyze the resulting spin wave patterns and their underlying physical mechanisms.
  • To explore the potential for imaging spin wave fields with sub-wavelength resolution.

Main Methods:

  • Fabrication of a one-dimensional grating using microslits in a thin Permalloy film.
  • Time-resolved scanning Kerr microscopy to probe spin wave dynamics.
  • Analysis of diffraction patterns to understand spin wave behavior.

Main Results:

  • Observed unique diffraction patterns of spin waves behind the microslit grating.
  • Demonstrated replications of the spin wave field at the grating slits.
  • Resolved spin wave images with details finer than the incident spin wave wavelength.

Conclusions:

  • The observed fine-scale spin wave images are a direct consequence of strongly anisotropic spin wave dispersion.
  • This phenomenon offers a novel method for high-resolution imaging of spin wave fields.
  • The findings contribute to the fundamental understanding of spin wave diffraction and have implications for magnonic device design.